Electric switch



ELECTRIC SWITCH Filed June 1.924

mo Q:-

1173i KEN T01 5 NIECTICU'E.

Application filed Juno ion itudin oi section there "a tines the construct/um;

ii is 21 section on the hue 'iihe pres switch comprises insuietingbase block 15. ioced apart at one end thereof. and utojecti from its uo oer face, are s n-inc; Contact nos 16 and 1 the oiilower ends "which. are in 1 eccsses and. engaged iespectiveiy heneeth the nut 18 em the head of a tapped rivet 19. The head oi he screw 20. which takes into the nut 18, serves to hold in position and establish electrical connection with o strep 2i. accommodated in o, countersunk channel 22 in the lower face of the block, and extending from the screw boit to the tapped rivet 2?) at the opposite end of the base. it is engaged beneath the Wire terrni nul plate 24: secured hy the rivet 28, into which takes the binding screw 25. The rivet 19 is directly engaged by the binding; screw 26, and siso hoids in pierce the Wire terminal piste 2?. switch are thus spaced eii and matter of ud-ditionsi precaution the terminal pistes seated on ledges 28 and 29 depressed from the tower taco oi? the has Upon upper ofth-e switch hose is an oioen ivresheped frame 30. secured "position h screws UQLSSiEH through case and orrun egcd'o i oosite of t chzinnei i suitnhie The lead Wires "for the CONNECTICUEE', A CQRPOEELATIDN @Ti 00H The switch-hut yoke is provided with us oiiset hesring tugs which engage in open hearings 3i; afforded by inciined, siots opening to one margin of the frame From the margin of one the yoke Fir-ins, extends the switch he? the free which is cerriec switch piece 38 "which passes s rvitcii ..r is insuh Washers yohc plays t from the ihg" the throw I interposed between the bridge 40 o' yoke and the inner end of the osciihitin switch lever is the u-ctu, in here shown the nature of how ng", with o c o ll and nine 38 and end is oiiset and engaged in t e otch to at the inner end of the oscihoting iever 32, The spring; is constsntiy stressed and the tendency of the arms is move apart.

The cnsing of the switch serves not 53 only as a. housing" the switch contacts and the operatin mechanism, but also as t 1e means by which the switch may he hodiiy supported in an eperturcd support 4%., such as the dash hoard of n (38.1, Wsii strucso ture, or the iihe, It is integral throughout and formed up from sheet metal. he end walls and constitute inuz tions of the opposite side Waits and ore hip jointed st The top inter-grit? with the sid Waits is e1 nded beyond the offset the isttei to rm esrs adapted no; i i by Which cured uhc e the notches in J over the hose, iii d is i 5"?" til the latter as the holes 59 come into register with the studs. ll desired the studs 58 may be oll'set and the cover thus riveted in position.

The entry ol' dust and dirt into the casing is eii'eetively prevented by the dome-like flange (ll on the operating lever 32, the curvature oi the flange being such that in all positions of the lever the aperture (32 in the casing through which it passes is substantially closed.

The operation of the switch will be readily understood. In Fig. 2 the parts are shown in open-circuit position, with the switch block 38 lying between but out of engagement with the widely spaced legs of the contacts 16 and 17. If the operating lever 31 be swung upward on its pivot 33, the end 45 of the spring-43 is not only moved toward the opposite end 4-2 pf the spring, thus further stressing the latter, but it is also shifted across the axis of oscillation of the switch bar yoke 34. The effort of the spring is now exerted upon the latter to throw it from stop lug 41 to stop lug 42. This throw of the rocker swings the switch bar in the direction to cause the switch piece 38 to engage between contacts 16 and 17, and thus establishes the circuit through the switch. Obviously a reversal of the movement of the contact lever swings the switch bar in the opposite direction, and again opens the circuit.

Various modifications in detail of construction and operation of the parts will readily occur to those dealing with the switch, without departing from what I claim as my invention, while still retaining the advantages of economy in construction, simplicity of manufacture, and efliciency of operation which result from the present in-,

vention.

I claim 1. In an electric switch an insulating base, a frame comprising a strap secured to the base with its ends extending away from the base and angled toward each other, said strap having side flanges offset from its 0pposite margins between said ends, and also angled away from the base to form stops, a switch bar yoke pivoted between the upstanding ends off throw limited b lever pivoted or. one arm of whicn switch, a rectangular insulating base, Si'iliCl contacts and mechanism mounted on one face of said base, a sheet metal casing folded to peripherally engage the base and secured thereon, and end flanges integral with said casing and forming end eontinuations of the casing top beyond the limits of the base to constitute a supportjt'or the base and associated structure.

3. In an electric switch, an insulating base, a switch mechanism mounted thereon and comprising a supporting frame with side members adjacent opposite sides of the base, a casing resting on the base and engaging elements of said side members of the frame engaging the opposite side Walls of the casing to secure it in position.

4. In an electric switch, an insulating base, a switch mechanism mounted thereon and comprising a supporting frame with side members, a casing resting on the base and engaging elements of said side members of the frame to secure it in position, together with means integral with the casing for supporting the base and associated structure.

5. In an electric switch, a base, switch mechanism mounted thereon and comprising a frame with side members, in combination with a sheet metal casing for said mechanism, said casing having lap jointed walls adapted to be sprung to permit the base to be adjusted on the base in looking engagement with detaining members on the side members of the switch frame.

6. In an electric switch, a sheet metal casing having integral top, side and end walls, certain of said walls comprising lapped sections adapted to he sprung for the purpose specified.

In testimony whereof I have signed my name to .this specification.

CARL ERIC ANDERSON. 

